151406 20251017144634.0 doi 10.1016/j.jcou.2025.103038 sideral 143096 ART-2025-143096 eng Aragüés-Aldea, P. Universidad de Zaragoza (orcid)0000-0001-6452-4258 Biogas upgrading through CO2 methanation in a multiple-inlet fixed bed reactor: Simulated parametric analysis 2025 Access copy available to the general public Unrestricted A simulation of the catalytic CO2 methanation reaction was carried out, evaluating the effect of reactants distributed feeding throughout the bed. The main operational parameters were studied in a multiple-inlet reactor to test their effect on conversions and, most importantly, on selectivities towards both CO and CH4 as reaction products. The analyzed parameters were, firstly, the number of feeding points (N) and the dosage degree of reactants, followed by temperature (T), partial pressures of reactants (H2:CO2 ratios), and the composition of a sweetened biogas as feeding stream (CH4:CO2 ratios). It is confirmed that a distribution of biogas through several side inlets improves selectivities to the desired CH4 product, over other feeding configurations. The effect of distributing reactants becomes intensified when the number of lateral feedings increases. This observation supports the experimental trends already proven in previous works. Regarding main operation parameters such as temperature and H2:CO2 molar ratio, the analysis confirmed that their influence on selectivities acts just as predicted at low conversions. However, when these conversions become higher the space velocity (WHSV) is the most important factor for selectivities. Finally, no significant changes in reaction performance were obtained when modifying the biogas CH4:CO2 ratio in the broad range of methane concentrations from 55 v% to 70 v%. info:eu-repo/grantAgreement/ES/AEI/PID2022-136947OB-I00 info:eu-repo/grantAgreement/ES/DGA/T43-23R info:eu-repo/grantAgreement/ES/MICINN/PRE2020-095679 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Mercader, V. D. Universidad de Zaragoza (orcid)0000-0003-0395-0143 Durán, P. Universidad de Zaragoza (orcid)0000-0003-2898-1085 Francés, E. Universidad de Zaragoza (orcid)0000-0003-3181-195X Peña, J. A. Universidad de Zaragoza (orcid)0000-0002-8383-4996 Herguido, J. Universidad de Zaragoza (orcid)0000-0003-1940-9597 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 X Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Proy. investigación HKA 93 (2025), 103038 [10 pp.] J. CO2 util. Journal of CO2 Utilization 2212-9820 1904801 http://zaguan.unizar.es/record/151406/files/texto_completo.pdf Versión publicada 2542575 http://zaguan.unizar.es/record/151406/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:151406 articulos driver 2025-10-17-14:28:01 ARTICLE